Tire valve



F. M. AHEARN May 24 1927.

TIRE VALVE I Filed Nov. 27, 1925 Y taken Substantially -upon the line Y drawings, my

Patented May 24, 1927.

UNITED-STATES v Y FRANK n. Aiiiiiimv; or KINDE, MICHIGAN.

Y 'una vALvE.

properly maintained therein underpressure.'

The primary object ofthe invention isto substantially improve and simplify this form of tirey valve now upon the market, one of the main points of the invention residing in the provision of vimproved means ,whereby the airsealing member per se is maintained in `positiveV contact with its cooperating means through the pressure of the air in the tube regardless. of the,Y position that said mcniberfinay take'ivitli respect'to the seat.

A further and 'mportant object is to provide a tire valve of this character wherein the air within the tube may be relieved therefrom in a much quicker manner than is now the case with other types of valves through the conjunction with pneumatic tire inner tubes.

A still further and provide a tire valve parts may that they may without the necessity important object is to of procuring an entirely new valve for kinsertion in the valve stem of the inner tube. l

lith the foregoing and other objects in view as the nature of the invention will be better understood, the machine comprisesfthe novel form, combination and arrangement of parts hereinafter more fully described and shown in the accompanying drawings and claimed.

In the drawing wherein characters indicate corresponding throughout the severalviews, n Figure 1 is an enlarged detail vertical section of a tire valve constructed in accordance with my'inventioii. C

Fig. 2 is a st'll further enlarged fragmentary section of the `lower vportion of the valve, and

Fig. 3 is a parts Fig. 1 and looking downwardly.

New havinglparticular reference'to the novel valve constitutes the provision of a metallic shell 5 that includes a lower relatively elongated tubular portion 6 and an upper cup-shaped portion 7 of less lengthbut greater wherein theV differenti be entirely disassembled in order*` be readjusted or repaired like reference detailed transverse .sectiony diameter than said portion16,v this portion k7 being internally screw `threaded for receiving a threaded cup 8 the upperedge of which is providedwith at di- 'ameti'ically opposed points lugs A9--9 in orderthat the valve when assembled may be properly disposed in conventional innertuhe valve stem, the external surface of the up-` per portion 7 of said shell heingthreaded" throughout its entire length for threadedv engagement withinsaid valve stein. y

The central portion of the bottom wall of the cup-shaped member 8 is formed with a boss y10y that engages within the upper` end of the'portion 6' of said shell through which is an air inlet and dischargeorifice 11 that is flared outwardly as at 12' upon the face 'may bek properly' fed intopositioii for closingtli'e orifice 11 after the tire has been properly inflated. Within the orifice 11 there is formed a depending rib 13 for a purpose hereinafter more fully described.

Disposed within the shell and being of a slightly greater length than said shell is a valve pin 14, the upper end of which is conically headed as at 15 for providing a ready means of moving the same in a downward position. Sai-d pin 1&1 'carries at a point beneath the cup orifice 11,*a valve member which is the form of va relatively small rubber ball 16, preferably of the shape as is shown. This rubber ball is suitably secured to -the stem and in contacting the lower surface thereof and also disposed upon said pin is a block of rubber 17 that provides apis-ton in order that thepressure of the air may be directed thereagainst for properlyseating the valve within the flared portion of the orifice7 said valve being formed at its upper end with a circumfer ential groove for receiving the rib 13 above described which will provide a positive air hereinafter described seal between the flared wallv ofthe orifice and lsaid valve.

Y The valve is normallymaintained in closed position even when the tire is not under pres- 22 that surrounds the stem at its lower between an' abutment 23 and a cross plate 19 atthe lower end of the portion 6V of the shell. This cross plate is provided at its opposite end with openings within which areengaged hook-like pins118`18 formed upon the lower end 'ofthe shell 6 at diametrically opposed points, VFor 'maintaining the spring in posirelation with oFFicE., 1

` of the lug in order that a valve member sure thru the medium of expansible spring endV tion said cross plate is formed concentric From the foregoing description when c'on-v sidered in conjunction with the accompanying drawings, it will be apparent that I have provided al highly noveland simple form of tire valve, and one wherein the parts thereof may be readily disassembled for repairs, renewal or changing purposes and one wherein a relatively positive seal will at .all times be provided for preventing an escape of the airvin the tire.

Minor changes may be made in the invention without departing from the spirit and scope ot the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

In a tire valve ot' the character described, a hollow tubular shell adapted for association within the inner tube valve stem, a cupshaped member disposedwithin the upper end ot' the shell and provided in the bottom wall 'thereof with a bore providing an air inlet and discharge oriice, a valve pin eX- ten'ding through the shell, a valve member carried by the pin beneath said orilice, the

pressure of the air within the tire acting against the valve for maintaining the same in a seated position against the orifice, and additional means for hol-ding the .valve closed, said means comprising a cross plate arranged within the lower end of the tubular shell, said cross plate being provided at diametrically opposite points with openings, and a central opening through which the lower end ol the valve stem projects, upwardlyv disposed hook-like pins extending inwardlyfrom the lowerend of the shell at diametrically opposite points and adapted for engagement with the respective diametrically opposed openings formed in the. cross plate, for supporting the latter, anjabutment arranged on the valve stem below the valve, and an eXpansible coil spring encircling the valve stem and interposed between the cross vplate and said abutment.V

In testimony whereof I affix my signature.

FRANK M. AHEARN. 

